Hemorrhagic stroke, i.e. cerebral blood vessel rupture and bleeding, resulting in local brain tissue damage, is divided into the following two conditions: 1. Subarachnoid hemorrhage: cerebral arteriosclerosis, forming tiny aneurysm rupture and bleeding, which is mostly seen in young people due to vascular malformation and may not leave sequelae after healing; 2. Parenchymal hemorrhage: commonly known as cerebral hemorrhage, cerebral hemorrhage. Parenchymal hemorrhage of brain tissue can cause localization symptoms, such as hemiparesis, hemianesthesia, hemianopsia, and swallowing disorder, speech disorder, cognitive disorder, manifested as poor memory, personality change, emotional irritability, post-stroke depression, etc.